From 23787fc71a9179e991c1bbeb0ca8f6448491d14f Mon Sep 17 00:00:00 2001
From: Anders Dalvander <anders.dalvander@gmail.com>
Date: Sun, 17 Nov 2024 16:23:01 +0100
Subject: [PATCH] fix #276: parse_infnan handles FASTFLOAT_ALLOWS_LEADING_PLUS
 correctly

---
 CONTRIBUTORS                      |  1 +
 include/fast_float/parse_number.h | 15 ++++++---------
 2 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index da1e5d6..4b70555 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -8,3 +8,4 @@ Lénárd Szolnoki
 Jan Pharago
 Maya Warrier
 Taha Khokhar
+Anders Dalvander
diff --git a/include/fast_float/parse_number.h b/include/fast_float/parse_number.h
index 5699bba..8b9fb85 100644
--- a/include/fast_float/parse_number.h
+++ b/include/fast_float/parse_number.h
@@ -25,18 +25,15 @@ from_chars_result_t<UC> FASTFLOAT_CONSTEXPR14 parse_infnan(UC const *first,
   from_chars_result_t<UC> answer{};
   answer.ptr = first;
   answer.ec = std::errc(); // be optimistic
-  bool minusSign = false;
-  if (*first ==
-      UC('-')) { // assume first < last, so dereference without checks;
-                 // C++17 20.19.3.(7.1) explicitly forbids '+' here
-    minusSign = true;
-    ++first;
-  }
+  bool const minusSign = (*first == UC('-')); // assume first < last, so dereference without checks;
 #ifdef FASTFLOAT_ALLOWS_LEADING_PLUS // disabled by default
-  if (*first == UC('+')) {
+  if ((*first == UC('-')) || (*first == UC('+'))) {
+#else
+  // C++17 20.19.3.(7.1) explicitly forbids '+' sign here
+  if (*first == UC('-')) {
+#endif
     ++first;
   }
-#endif
   if (last - first >= 3) {
     if (fastfloat_strncasecmp(first, str_const_nan<UC>(), 3)) {
       answer.ptr = (first += 3);